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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 27 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 84 =
  2. 2.Half of 32 =
  3. 3.Double 58 =
  4. 4.Double 67 =
  5. 5.Double 29 =
  6. 6.Half of 62 =
  7. 7.Double 26 =
  8. 8.Half of 16 =
  9. 9.Double 71 =
  10. 10.Half of 78 =
  11. 11.Half of 82 =
  12. 12.Double 22 =
  13. 13.Half of 162 =
  14. 14.Half of 42 =
  15. 15.Half of 174 =
  16. 16.Double 87 =
  17. 17.Double 65 =
  18. 18.Half of 56 =
  19. 19.Half of 122 =
  20. 20.Double 97 =
  21. 21.Double 83 =
  22. 22.Double 56 =
  23. 23.Half of 22 =
  24. 24.Double 27 =
  25. 25.Half of 18 =
  26. 26.Half of 124 =
  27. 27.Double 13 =
  28. 28.Double 48 =
  29. 29.Double 85 =
  30. 30.Half of 184 =
  31. 31.Half of 146 =
  32. 32.Double 38 =
  33. 33.Double 57 =
  34. 34.Double 41 =
  35. 35.Double 77 =
  36. 36.Double 99 =
  37. 37.Double 96 =
  38. 38.Half of 64 =
  39. 39.Double 89 =
  40. 40.Half of 196 =

Answer key

  1. 168
  2. 16
  3. 116
  4. 134
  5. 58
  6. 31
  7. 52
  8. 8
  9. 142
  10. 39
  11. 41
  12. 44
  13. 81
  14. 21
  15. 87
  16. 174
  17. 130
  18. 28
  19. 61
  20. 194
  21. 166
  22. 112
  23. 11
  24. 54
  25. 9
  26. 62
  27. 26
  28. 96
  29. 170
  30. 92
  31. 73
  32. 76
  33. 114
  34. 82
  35. 154
  36. 198
  37. 192
  38. 32
  39. 178
  40. 98

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